// Behavior originally contributed by mastahg.
//
// LICENSE:
// This work is licensed under the
//     Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
// also known as CC-BY-NC-SA.  To view a copy of this license, visit
//      http://creativecommons.org/licenses/by-nc-sa/3.0/
// or send a letter to
//      Creative Commons // 171 Second Street, Suite 300 // San Francisco, California, 94105, USA.
//

#region Summary and Documentation
#endregion


#region Examples
#endregion


#region Usings

using System;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using CommonBehaviors.Actions;
using Honorbuddy.QuestBehaviorCore;
using Styx;
using Styx.Common;
using Styx.CommonBot;
using Styx.CommonBot.Profiles;
using Styx.CommonBot.Routines;
using Styx.Pathing;
using Styx.TreeSharp;
using Styx.WoWInternals;
using Styx.WoWInternals.WoWObjects;

using Action = Styx.TreeSharp.Action;
#endregion


namespace Honorbuddy.Quest_Behaviors.SpecificQuests.SpecificQuests.TheDefilersRitual
{
    [CustomBehaviorFileName(@"SpecificQuests\28611-Uldum-TheDefilersRitual")]
    public class Zakahn : CustomForcedBehavior
    {
        public Zakahn(Dictionary<string, string> args)
            : base(args)
        {
            QBCLog.BehaviorLoggingContext = this;

            try
            {
                // QuestRequirement* attributes are explained here...
                //    http://www.thebuddyforum.com/mediawiki/index.php?title=Honorbuddy_Programming_Cookbook:_QuestId_for_Custom_Behaviors
                // ...and also used for IsDone processing.
                Location = GetAttributeAsNullable<Vector3>("", true, ConstrainAs.Vector3NonEmpty, null) ?? Vector3.Zero;
                QuestId = 28611;
                QuestRequirementComplete = QuestCompleteRequirement.NotComplete;
                QuestRequirementInLog = QuestInLogRequirement.InLog;
            }

            catch (Exception except)
            {
                // Maintenance problems occur for a number of reasons.  The primary two are...
                // * Changes were made to the behavior, and boundary conditions weren't properly tested.
                // * The Honorbuddy core was changed, and the behavior wasn't adjusted for the new changes.
                // In any case, we pinpoint the source of the problem area here, and hopefully it
                // can be quickly resolved.
                QBCLog.Exception(except);
                IsAttributeProblem = true;
            }
        }

        // DON'T EDIT THIS--it is auto-populated by Git
        public override string VersionId => QuestBehaviorBase.GitIdToVersionId("$Id: 13ce84f0b6bf7d2e4733efb7183a3c01b8752182 $");


        // Attributes provided by caller
        private int QuestId { get; set; }
        private QuestCompleteRequirement QuestRequirementComplete { get; set; }
        private QuestInLogRequirement QuestRequirementInLog { get; set; }
        private Vector3 Location { get; set; }

        // Private variables for internal state
        private bool _isBehaviorDone;
        private bool IsOnFinishedRun { get; set; }
        private Composite _root;

        private LocalPlayer Me { get { return (StyxWoW.Me); } }


        private WoWUnit Zah
        {
            get
            {
                return
                    ObjectManager.GetObjectsOfType<WoWUnit>()
                    .FirstOrDefault(u => u.IsValid && (u.Entry == 49148));
            }
        }


        private List<WoWUnit> Guards
        {
            get
            {
                return
                    ObjectManager.GetObjectsOfType<WoWUnit>()
                    .Where(u =>
                        u.IsValid
                        && (u.Entry == 49156)
                        && !u.IsDead)
                        .ToList();
            }
        }


        private static WoWUnit Snake
        {
            get
            {
                return
                    ObjectManager.GetObjectsOfType<WoWUnit>()
                    .Where(u =>
                        u.IsValid
                        && (u.Entry == 49159)
                        && !u.IsDead)
                    .OrderBy(u => u.DistanceSqr)
                    .FirstOrDefault();
            }
        }


        private Composite DoneYet
        {
            get
            {
                return new Decorator(ret => Me.IsQuestComplete(QuestId),
                    new Action(delegate
                    {
                        TreeRoot.StatusText = "Finished!";
                        _isBehaviorDone = true;
                        return RunStatus.Success;
                    }));
            }
        }


        private Composite DoPull
        {
            get
            {
                return
                    new PrioritySelector(
                        new Decorator(ret => RoutineManager.Current.PullBehavior != null,
                            RoutineManager.Current.PullBehavior),
                        new Action(c => RoutineManager.Current.Pull()));
            }
        }

        private Composite CheckSpot
        {
            get
            {
                return new Decorator(ret => !Me.Combat && (Me.Location.Distance(Location) > 1),
                    new Action(ret => Navigator.MoveTo(Location)));
            }
        }


        private void SetPetMode(string action)
        {
            var spell = StyxWoW.Me.PetSpells.FirstOrDefault(p => p.ToString() == action);
            if (spell == null)
                return;

            QBCLog.Info("[Pet] Casting {0}", action);
            Lua.DoString("CastPetAction({0})", spell.ActionBarIndex + 1);
        }


        private void PullMob()
        {
            string spell = "";

            switch (Me.Class)
            {
                case WoWClass.Mage:
                    spell = "Ice Lance";
                    break;
                case WoWClass.Druid:
                    spell = "Moonfire";
                    break;
                case WoWClass.Paladin:
                    spell = "Judgment";
                    break;
                case WoWClass.Priest:
                    spell = "Shadow Word: Pain";
                    break;
                case WoWClass.Shaman:
                    spell = "Flame Shock";
                    break;
                case WoWClass.Warlock:
                    if (Me.GotAlivePet)
                        SetPetMode("Passive");

                    spell = "Corruption";
                    break;
                case WoWClass.DeathKnight:
                    if (Me.GotAlivePet)
                        SetPetMode("Passive");

                    spell = "Dark Command";
                    break;
                case WoWClass.Hunter:
                    if (Me.GotAlivePet)
                        SetPetMode("Passive");

                    spell = "Arcane Shot";
                    break;
                case WoWClass.Warrior:
                    if (SpellManager.CanCast("Shoot"))
                        spell = "Shoot";
                    if (SpellManager.CanCast("Throw"))
                        spell = "Throw";
                    if (SpellManager.CanCast("Heroic Throw"))
                        spell = "Heroic Throw";
                    break;
                case WoWClass.Rogue:
                    if (SpellManager.CanCast("Shoot"))
                        spell = "Shoot";
                    if (SpellManager.CanCast("Throw"))
                        spell = "Throw";
                    break;
                case WoWClass.Monk:
                    spell = "Provoke";
                    break;
            }

            if (!String.IsNullOrEmpty(spell))
            {
                SpellManager.Cast(spell);
            }
        }


        private Composite PullOne
        {
            get
            {
                return new Decorator(ret => !Me.Combat,
                    new Action(delegate
                    {
                        Navigator.PlayerMover.MoveStop();
                        Guards[0].Target();
                        Guards[0].Face();
                        PullMob();
                    }));
            }
        }


        private Composite KillIt
        {
            get
            {
                return
                    new Decorator(ret => (Me.CurrentTarget != null
                                            && Me.CurrentTarget.IsWithinMeleeRange)
                                         || (Me.Class == WoWClass.Hunter),
                        Bots.Grind.LevelBot.CreateCombatBehavior());
            }
        }


        private Composite KillAdds
        {
            get
            {
                return
                    new Decorator(ret => Guards.Count > 0,
                        new PrioritySelector(
                            CheckSpot,
                            PullOne,
                            KillIt,
                            new ActionAlwaysSucceed()));
            }
        }



        private Composite TargetHim
        {
            get
            {
                return new Decorator(ret => (Me.CurrentTarget == null) || (Me.CurrentTarget != Zah),
                    new Action(delegate
                    {
                        Zah.Target();
                        Zah.Face();
                        if (Me.GotAlivePet)
                            SetPetMode("Assist");
                    }));
            }
        }

        private Composite Pullhim
        {
            get { return new Decorator(ret => !Me.Combat, DoPull); }
        }


        private Composite KillSnakes
        {
            get
            {
                return new Decorator(r => Snake != null,
                    new PrioritySelector(
                        new Decorator(r => !Me.GotTarget || (Me.CurrentTarget != Snake),
                            new Action(r => Snake.Target())),
                        RoutineManager.Current.CombatBehavior
                    ));
            }
        }

        private Composite KillBoss
        {
            get
            {
                return new Decorator(ret => Zah != null && !Zah.IsDead,
                    new PrioritySelector(
                        TargetHim,
                        Pullhim,
                        new Decorator(ret => StyxWoW.Me.Combat,
                            new PrioritySelector(
                                RoutineManager.Current.HealBehavior,
                                new Decorator(ret => Me.GotTarget
                                                        && !Me.CurrentTarget.IsFriendly
                                                        && !Me.CurrentTarget.IsDead,
                                    new PrioritySelector(
                                        RoutineManager.Current.CombatBuffBehavior,
                                        RoutineManager.Current.CombatBehavior))))

                    ));
            }
        }


        protected override Composite CreateBehavior()
        {
            return _root ?? (_root =
                new Decorator(ret => !_isBehaviorDone,
                    new PrioritySelector(
                        DoneYet,
                        KillAdds,
                        KillSnakes,
                        KillBoss,
                        new ActionAlwaysSucceed())));
        }


        #region Overrides of CustomForcedBehavior

        public override bool IsDone
        {
            get
            {
                return (_isBehaviorDone     // normal completion
                        || !UtilIsProgressRequirementsMet(QuestId, QuestRequirementInLog, QuestRequirementComplete));
            }
        }


        public override void OnFinished()
        {
            // Defend against being called multiple times (just in case)...
            if (IsOnFinishedRun)
            { return; }

            // Clean up resources...
            Targeting.Instance.IncludeTargetsFilter -= Instance_IncludeTargetsFilter;
            TreeHooks.Instance.RemoveHook("Questbot_Main", CreateBehavior());

            TreeRoot.GoalText = string.Empty;
            TreeRoot.StatusText = string.Empty;

            // QuestBehaviorBase.OnFinished() will set IsOnFinishedRun...
            base.OnFinished();
            IsOnFinishedRun = true;
        }


        public override void OnStart()
        {
            // This reports problems, and stops BT processing if there was a problem with attributes...
            // We had to defer this action, as the 'profile line number' is not available during the element's
            // constructor call.
            OnStart_HandleAttributeProblem();

            // If the quest is complete, this behavior is already done...
            // So we don't want to falsely inform the user of things that will be skipped.
            if (!IsDone)
            {
                TreeHooks.Instance.InsertHook("Questbot_Main", 0, CreateBehavior());
                Targeting.Instance.IncludeTargetsFilter += Instance_IncludeTargetsFilter;

                this.UpdateGoalText(QuestId);
            }
        }
        #endregion


        #region Target Filters
        private void Instance_IncludeTargetsFilter(List<WoWObject> incomingUnits, HashSet<WoWObject> outgoingUnits)
        {
            var targetGuid = StyxWoW.Me.CurrentTargetGuid;
            foreach (var unit in incomingUnits)
            {
                if (unit.Guid == targetGuid)
                    outgoingUnits.Add(unit);
            }
        }
        #endregion
    }
}